每段录音都有一系列押韵的单词，志愿者们必须在不同程度的背景噪声下识别这些单词。

Each recording had a series of rhyming words that the volunteers had to identify for different levels of background noise.

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背景噪声几乎不会影响衣兜里的播放质量和录音质量，但它不能自动关机。

Background noise hardly affects the sound and recording from a pocket is perfectly possible, but it doesn't turn off automatically.

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但是，毕竟更为精巧的录音阵列手段可以克服背景噪声，这使得文本输入仍然面临被破译的危险。

Ultimately, though, more sophisticated recording arrays could overcome even background noise, rendering any typed text vulnerable.

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